The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 16, 1996
Filed:
Mar. 01, 1993
Masahiko Kasashima, Tokyo, JP;
Nobuyuki Nanno, Tokyo, JP;
Kouichirou Takeguchi, Tokyo, JP;
Kazuo Akashi, Tokyo, JP;
Yoshiaki Suzuki, Tokyo, JP;
Makoto Ando, Tokyo, JP;
Yuji Yamanaka, Tokyo, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
A personal computer of this invention has a battery pack mounting section for detachably receiving battery packs having different current capacities. The personal computer also includes a switch mechanism for detecting whether a battery pack has a high or low capacity. Battery characteristic values consisting of charge and discharge voltage/current characteristics in units of batteries are prestored in a memory in a power control CPU (PC-CPU). The PC-CPU refers to the memory on the basis of capacity data from the switch mechanism and reads out the corresponding battery characteristic data. A power supply circuit performs optimal charge control on the basis of this characteristic data. Two battery packs are prepared. When the PC-CPU detects that the currently used battery pack is in a low-battery state, it selects the other battery pack to supply the operating power to the personal computer. At the same time the PC-CPU performs optimal charge control of the battery in the low-battery state.